1022212222021 has 4 divisors (see below), whose sum is σ = 1041499245132. Its totient is φ = 1002925198912.

The previous prime is 1022212222007. The next prime is 1022212222037. The reversal of 1022212222021 is 1202222122201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 917486201025 + 104726020996 = 957855^2 + 323614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022212222021 is a prime.

It is a super-2 number, since 2×1022212222021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022212222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022212222001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9643511476 + ... + 9643511581.

It is an arithmetic number, because the mean of its divisors is an integer number (260374811283).

Almost surely, 2^{1022212222021} is an apocalyptic number.

It is an amenable number.

1022212222021 is a deficient number, since it is larger than the sum of its proper divisors (19287023111).

1022212222021 is an equidigital number, since it uses as much as digits as its factorization.

1022212222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19287023110.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1022212222021 its reverse (1202222122201), we get a palindrome (2224434344222).

The spelling of 1022212222021 in words is "one trillion, twenty-two billion, two hundred twelve million, two hundred twenty-two thousand, twenty-one".